Your company has an Active Directory Domain Services (AD DS) domain. You have multiple Remote
Desktop Session Host (RD Session Host) servers. You have 100 Windows Server 2008 R2 Remote
Desktop Services client access licenses (RDS CALs) installed on your license server. You need to
return 10 RDS CALs to the pool on the license server. What should you do?

A.
Remove the Per User RDS CALs.

B.
Revoke the Per Device RDS CALs.

C.
Remove the Per Device RDS CALs.

D.
Repeat the installation of the RDS CALs.

Explanation:
A permanent RDS Per Device CAL issued by a license server is configured to automatically expire
after a random period between 52 and 89 days, at which time the RDS Per Device CAL returns to the
pool of available RDS Per Device CALs on the license server. In some circumstances, you might want
or need to return an RDS Per Device CAL that has been issued back to the available pool on the
license server before the automatic expiration period has been reached. For example, you might
want to do this if the client computer or device is no longer a part of your environment. You can
revoke an RDS Per Device CAL by using the Remote Desktop Licensing Manager tool. Important You
can only revoke an RDS Per Device CAL. You cannot revoke an RDS Per User CAL.
http://technet.microsoft.com/en-us/library/cc732416.aspx